Muffler



Feb. 9 1926.- 1,572,116

F. J. HERDLE MUFFLER Filed April 7, 1924 N INVENTOR N ATTORNEYS w v i et. 9, 1926. 1,572,116

"UNITED STA Es PATENT OFFICE.

MUFFLER,

ap lication-med April 7, 1924. Serial No. 704,882.

To all whom it may concern: Figure 3 is a seetion along the line 3-3 Be it known that 1, FREDERICK Josnrrr of'Figure 1. 55

HERnLn, a citizen of the United States, and In carrying out my invention I provide a resident of Chicago, in the county of'Cook a casing 1 which is closed at one end by 6 and Stat illllinois, have invented a new means of a cup-shaped member 2 and at and use 111 Improvement in Mufiiers, of the other end by means of a cap 3. The ends which t e following is a full, clear, and ex- 2 and 3 are provided .with openings 4 and 50 act description. 5 through which a pipe 6 extends. The pipe My invention relates to improvements in 6 has a flared end 7 which bears against the mufiiers, and it consists in the combinations, wall of the end 2 and holds the endin adconstruction and arrangements herein dejusted position on the casingl. The end scribed and claimed. 2 has a flange 8 which receives the casing 65 An object of my invention is to provide 1 and prevents the lateral movement of the a muffler which is adapted to cause a cold end 2 with respect to the casing 1. The pipe stream of air to flow through and around a 6 has a threaded end 9 upon which the nut streamof exhaust gases and which will 10 is screwed. It will be noted from this also break up the gases and mix the gases construction that the nut 10 when tightened, 7 with air before expelling the gases from locks the covers 2 and 3, casing 1 and pipe the, mufiier, whereby the gases will be ex- 6 together. The cover or end 3 has a ring pelled from the muflier in a steady stream 11 which is riveted thereto and which is so as to quickly cool the gases. spaced from the inner wall of the cover so A further object of my invention is to as to provide a recess 12 that receives one 7 provide a device of the character described end of the casing 1. which is especially adapted for engines of The means for conveying the gases into twin types, such as the twin six, the two the casing is shown in the Figures 1 and 3. exhaust pipes which extend from the engine It will be noted from Figure 3 that the being led to the muffler in such a manner as cover or end 3 is provided with two openings 8 to cause the gases, on entering the mutiler 13 and 14 through which the pipes 15 and from the two exhaust pipes, to mix and flow 16 project. The pipes 15 and 16 are curved easily into the mufiler instead of bucking around the pipe 6 so as to direct the gases each other. toward the end of the casing 1 that is pro- A further object of my invention is to vided with the cup-shaped en 2. Figure 1 s5 rovide a device of the character described shows an exhaust pipe 17 in dotted lines, which has means to take care of the exhaust this pipe being connected to the pipe 15 by gases whether the engine is running at low means of a coupling 18. Inlike manner speed "or at highspeed. the pipe 16 may be connected to an exhaust A further object of m invention is to pipe not shown. The 0 en ends of the pipes provide a device of the e aracter described 15 and 16 are indicate by numbers 19 and which is constructed of stamped out parts 20 and it will be noted that these ends are 40 whereby the device may be manufactured at adapted to direct the gases toward the opslight expense. posite end of the casing 1. If only one ex- Other objects and advantages will appear haust pipe is used, one of the'openings 13 in the following specification, and the novel or 14; may be closed. features of the invention will be particularly The means for mufiling the gases and to pointed out in the appended claims. cause them to flow in a steady stream corn- My invention is illustrated in the accomprises a conical-shaped tube 21 that has ts panying drawings forming part of this apend 22 spaced from the pipe 6 and has its plication, in which other end 23 abut the pipe 6. The pipe 6 Figure 1 is a vertical section through the and the tube 21 are provided with IlbS 24 device, a portion thereof being shown in and 25 whereby the tube 21 1s prevented elevation. from longitudinal movement with respect to Figure 2 is a section along the line 2-2 the pipe'6. The clamp 26 locks the tube 21 of Figure 1, and to the pipe 6 and tart er alds in preventmg ings to permit all of any movement of the tube with respect to the pipe. The end 22 of the-tube is spaced from the pipe 6 by means of small leaf springs 27.

The gases formed from the pipes 15 and 16 strike the end 2 and then flow into the spec between the tube 21 and the pipe 6. It wi 1 be noted from Figures 1 and 2 that the pipe 6 is rovided with a helical rib 28. The rib is \Rshaped in cross section, see

igure 1. The side of the rib which faces the end 22 of the tube 21 is provided with a plurality of open1ngs'29, see Figure 2. The openings are shaped so as to receive the gases of combustion and direct them into the interior of the pipe 6. As soon as the tube 21 has its end 23 closed, all of the gases pass through the openings 29 openings in will be sufli In case the speed of the engine is increased, more gases will be forced into the mufller and it will require more of the openings 29 to permit these gases to escape into the pipe here are a suflicient number of openthe gases to escape into t eplpe 6, even though the engine is runspeed. In this way the muflier for automatically permitting the gases to escape through the low speed. rom the foregoing description of the various parts of the device, the operation thereof may be readily understood. heretofore stated the gases of combustion may be led into the muflier b of the pipes 15 or 16. In case both of the wall of the rib 28 that has the openings 29 therein is,

cause the gases to pass through the openlugs 29. The openings 29 are disposed at- .such an angle that they direct the gases into the pipe 6 at an angle which is approxi- With respect to the longitudinal pipe 6. The gases are therefore the air that flows through the through the cup-shaped end and tremely simple in construction and ma anufactured from stamped out pieces, W eby the cost 0 manufacturing is reuccdto a minimum I claim- A eufiler comprising a casing havin exhaust gasinlet openings, pipe dispOSe inlet pipes disposed In said h casing, a pipe extending through the opposite end of said casing, shaped end of said casing openings breaking up small streams, whereby the gases will be expelled from said pipe in a constant stream. flier comprising a casing, said casing having a diametrically op- .to convey gases. a pipe, said inlet pipes being curvcdaround pipe and having their posed diametrically opposite each other and positioned so a to direct the gases parallel to the longitudinal axis of the muiiler comprising casing having a pair of mufiler. a casing, said diametrically opa pipe, openings in said pipe, a funnelshaped memb said inlet pipes being curved around said pipe and having their inner ends disposed diametrically opposite each other, whereby the gases will flow in one direction in said casing and be quietly mixed.

5. A muflier comprising a casing, exhaust gas inlet pipes disposed in said casing, a pipe extending through the casing and terminating at the ends of said casing, said last named pipe being adapted to carry a large quantity of air thercthrough, said pipe having a rib therein with openings, the openings in said rib being positioned so as to breakup the gases of combustion into ect these streams of which the air takes hrougi said pipe, whereby the gases will be mixed with the air and will be expelled from said pipe in a constant stream.

' FREDERICK JOSEPH 'HER'DLEJI inner ends diser mounted upon said pipe,

set I 

